cfg/atari-xex.cfg: fix typo in comment

[cc65] / doc / cc65.sgml

diff --git a/doc/cc65.sgml b/doc/cc65.sgml
index 11a5937b2cbf788c55d042fc2b0980bbe8c5017e..11b112f6f0f265a8f6a0268494b28fb7cdb852f7 100644 (file)
--- a/doc/cc65.sgml
+++ b/doc/cc65.sgml
@@ -4,7 +4,6 @@
 <title>cc65 Users Guide
 <author><url url="mailto:uz@cc65.org" name="Ullrich von Bassewitz">,<newline>
 <url url="mailto:gregdk@users.sf.net" name="Greg King">
-<date>2017-05-20
 
 <abstract>
 cc65 is a C compiler for 6502 targets. It supports several 6502 based home
@@ -777,6 +776,25 @@ This cc65 version has some extensions to the ISO C standard.
         size zero, even if it is initialized.
         <p>
 
+<item>  Computed gotos, a GCC extension, has limited support. With it you can
+        use fast jump tables from C. You can take the address of a label with
+        a double ampersand, putting them in a static const array of type void *.
+        Then you can jump to one of these labels as follows:
+
+        <tscreen><verb>
+        static const void * const jumptable[] = {
+                &amp;&amp;add,
+                &amp;&amp;sub
+        };
+        goto *jumptable[somevar];
+
+        add:
+        ...code...
+        </verb></tscreen>
+
+        In the jump table, no expressions are supported. The array index
+        used in the goto must be a simple variable or a constant.
+
 </itemize>
 <p>